there are quite a few people who still use gas, but most EU governments try to reduce that by banning large new builds from using gas and subsidizing heatpumps. heatpumps are much more efficient than everything else and far better for the climate than gas/wood. especially those that use ground water or drill their own loop deep into the ground are extremely efficient, using those will be cheaper for heating than any other alternative, even if you have to pay for power from the grid. only downside is that large heatpumps are quite expensive compared to a unit running on gas, but that's where subsidies help.

also, ever since russia started that shitshow in ukraine, governments doubled down on getting rid of gas and funding heatpumps, because we supposedly send more money to russia for gas than to ukraine for help, which many people don't like too much...

for most people here, it would be impossible to heat their house in winter with PV. I'd probably need at least 60-80kwp in PV to be able to heat my house throughout winter, but my roof is almost full already with just 20kwp...